Longest Volcano Tube in the World

This was an interesting find on the Island of Jeju in South Korea. This is where the largest known volcanic                     tube in the world is found.  The tube was huge compared to the ones I have seen in Hawaii. It was a cool, rainy day and water was dripping from the ceiling above, so after a few minutes of walking this tube, we decided to turn around. We do not know how much longer it was, but we are convinced that they are correct about it being the longest. Yes, we were skeptical before the long walk. You can see the fog inside the tube in the first picture.